- Blender: a full-featured, multiplatform 3D modelling package, capable of doing much more than simply modelling 3D objects, as it includes rendering, animations, particles and much more. The downside to Blender is its interface, which some find very difficult to learn.
- Google Sketchup: a basic 3D modelling program specifically designed to be simple to use. Indeed one often finds K-9 students deeply engrossed in Sketchup building fantasy homes or castles. The downside to Sketchup is a relative lack of advanced features you’d find in Blender. Sketchup has many plugins available, one of which enables export of .STL files suitable for 3D printing.